Home » Science Projects » Science Project on “Rate of Evaporation”, Project Experiment Topics on Environmental Science for Class 8, 9, 10 and 12 Students.

Science Project on “Rate of Evaporation”, Project Experiment Topics on Environmental Science for Class 8, 9, 10 and 12 Students.

Rate of Evaporation

Materials Required:

  1. Two 1-pound plastic butter tubs
  2. Potted soil
  3. Measuring cup
  4. Food scale
  5. Water

Plants need water to survive. Garden plants are watered more often than those that are indoors. Since the sun and air dry the soil, they need more water than potted plants.

Fill two 1-pound plastic butter cups with potted soil. Make sure they are loosely packed. With the help of a small food scale, see to it that they weigh the same(you can also make a simple balance beam, using a ruler across a pencil). Now fill half a measuring cup with water and pour it into the tub. Do the same with the other tub.

Place one tub outside in the sun and the other by the window in the house. Weigh each of them on the scale at the end of two days and observe.

The tub with lower density will have had more water absorbed out of it. What is the difference if you carry this activity on a cloudy day? Does strong wind affect the outcome of the test?

Making of Rain and Snow

Water constantly evaporates into the air from seas, lakes, rivers and is also released by plants, animals and human beings. Warm air rising upwards into the atmosphere, carries with it the evaporated water vapour. As the air rises it comes into contact with colder air which condenses the water vapour to form drops of water or ice crystals. Clouds are formed as a result of this action. As time passes the clouds accumulate a lot of water and become heavy. Since they are unable to hold the water, it falls to the ground in the shape of ‘Rain’. If the clouds are located over mountains where the air is very cold, then the water freezes to form ice crystals which stick together and fall to the ground as ‘Snow’. Water also freezes in clouds located at a high altitude to form small round lumps of ice, called ‘Hailstones’ which often fall to the ground when it is raining. It does not rain evenly on all parts of the Earth. We have little or no rain in the deserts and excessive rain in the Equatorial regions.


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